Spraying device



A. S. KNAPP SPRAYING DEVICE Feb. 10, 1953 2 SHEETS--SHEET 1 Filed Jan. 15, 1949 A. S. KNAPP SPRAYING DEVICE Feb. 10, 1953 2 SHEETSSHEET 2 Filed Jan. 15, 1949 Patented Feb. 10, 1953 UNITED STATES PATENT OFFICE SPRAY IZZ D EVICE v Andrew St Knapp, St. Louis, Mo., assignor to Knapp-Monarch Company, St. Louis; Mo.,..a

corporation of Delaware ApplicationJanuary 15, 1949, Serial No. 71,130

3 Glaims'. 1

This invention rel'atesto a spraying device com-' prising a holder for a bulb of liquid under pres sure, the holder receiving the bulb and providing a piercing and control valve means therefor.

One object of the invention isto provide a relatively simple holder which is inexpensive tomanufacture and which has the bulb of liquid under pressure removably connected therewith so as: to

ermit a new bulbto be used when theliquid from one is useclup, the arrangement being SllChas to obviate the necessity of a syphon tube in each bulb as they are successively connected withthe holder.

Another object is to provide a holder which receives the bulb in inverted position. and includes a means for puncturing the neck of the bulb in that position so that liquid in the. bulb isin com munication with the punctured portion. of the bulb, and gas under pressure in the bulb isabove the liquid for displacing substantially all of the liquid before the gas can flow from the bulb.

Still another object is toprovide a holder having, an Opening in the top to receive the bulb and: the bulb provided with screw threads for threading it into a bulb piercing fitting with which a conduit is connected that extends up to the top of the container where a control valve is located.

A further object is to provide a relatively simple and inexpensive control valve and a novel means for mounting and operating the same.

Still a further object is to provide a discharge nozzle having a restricted. passageway to limit flow of liquid under pressure and to cause the same to be finely atomized in theform of an aerosol as it is discharged from the nozzle.

An additional object is to provide a removable nozzle that can be readily cleaned it it becomes clogged, with the passageways up to the nozzle relatively large so that there is very little likelihood of them ever becoming clogged.

Another additional object is to provide a modifled construction wherein the usual type of Sparklet bulb with unthreaded neckmay be. usedin the sprayer.

With these and other objects in view,,myinvention consists in the construction, arrangement of the parts of my spraying device wherebythe objects contemplated are attainedas hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings;v

wherein:

Figure Lisa perspective View or a spraying device embodying my present invention.

Figure 2' is. an enlarged vertical sectional view thereof withthe exception of the nozzle.

Figure 3 is a still more greatly enlarged sectional view of the nozzle and the valve associatedtherewlth.

Figures 4 andfi are sectional views similarto a portion of Figure 2 showing the action of certain parts of the: spraying devicewhen the bulb is in different positions relative to a piercing pin.

Figure 6 is a detail sectional view on the line 6--6 of Figure 2,.and

Figure: 7 is a verticalsectional view of a modified construction utilizing an ordinary pressure bulb as distinguished from one having a special (threaded) neck;

on the accompanying drawings I have used the reference numeral ID to illustrate a cylindrical -.wall of a container, which container has a top wall l2 provided with a relatively large opening (and a bottom wall 16. A false bottom It is also; provided, the parts Ill-12, l5 and I8 being stamped. or drawn from sheet metal and telescoped. together as illustrated in Figure 2. The telescoping! parts are then spot welded. or soldered together to retain themassembled.

,A bulb piercing fitting. 2B is provided which extends through the bottom member l6 and is connected thereto as by solder indicated at 22. The. fitting 20 has. therein a piercing pin 24, the pin being hollow in the usual manner and cut off at an angle atits upper end so asto shear into the neckof a bulb, 26' when associated therewith. The-manner of association is preferably by means of screw threads-18' on the neck of the. bulb threadedint'o the fitting. 20 although I disclose a modified construction in Figure 7.

A. fluid. delivery conduit in the form of a tube 30. is provided having one end soldered into the lower end of the fitting 20. asindicated at 32 and having a U-bend permitting the. tube to thereafter extend upwardly through the bottom member L6 to which it is soldered as indicatedat 36 and: on upwardly through an opening 36 in the top wall I2 of the holder This opening is larger than the diameter of the tube 3G so as not to restrict. its upper end against proper alignment with a control valve which will now be described. v

The control valve is in the form of a fitting 38' riveted as at dd to an annular valve lever 52. The lever is provided with opposite pivot ears 4 and the top wall I2 of the container is provided with companion pivot ears 46, all the ears being perforated to receive the ends of a spring bail it. When the terminal ends of this bail are sprung into position the resiliency of the bail retains the terminal ends on the pivot cars 44 and 26 to act as pivots therefor.

A return spring 50 for the valve lever is provided having its ends seated on humps 52 and 54 of the top wall l2 and the annular lever 42, respectively. This spring tends to keep the control valve closed.

The valve fitting or body 38 has a resilient sealing disc 55 seated therein and engaged with the upper end of the tube 30 due to the action of the spring 56. When the portion of the annular valve lever 62 over or adjacent the spring 50 is depressed, this disc is lifted from the upper end of the tube 38 as in Figure 3 so that the fluid then flows as indicated by the arrow 58 into a nozzle 65.

The nozzle 6% is threaded into the valve body 33 so that it is readily removable, a gasket 52 being provided to seal the two in relation to each other. To prevent liquid from flowing out of the lower end of the valve body 38 I provide a resilient sealing washer 6d surrounding the tube 38.

The nozzle 66 is provided with a restriction in the form of a capillary tube 66 pressed into the bore of the nozzle, which tube has an internal diameter of only about .016". The tube 3!], on the other hand, may have an internal diameter in the neighborhood of .040 so that it is not at all likely for it to ever become clogged.

The capillary tube 68 serves as a restriction to prevent the fluid from being discharged at a too rapid rate and to insure that it is discharged in the form of an aerosol. The tube 66 is used instead of attempting to drill a hole this small in the nozzle 68 as drill breakage for such a long hole is not economical and the drilled hole would not be nearly as smooth as the bore of a capillary tube.

A seal for the neck of the bulb 28 is provided in the form of a gasket 25 having an original shape somewhat as shown in Figure 5. As the bulb 2B is screwed into the bulb the piercing fitting 29 at first squeezes the gasket 25 into an annular groove 2! of the fitting as shown in Figure 4 and around the piercing pin 24 to effect a seal before the sharpened upper end of the piercing pin is contacted by the bulb. Thus a seal prior to escape of liquid from the bulb is assured.

This arrangement also provides for safety in the operation of the spraying device in the event of the parts becoming clogged so that the bulb cannot discharge after it is pierced. It can then be unscrewed without the pressure causing it to pop out of the holder H and discharge insecticide on the operator or adjacent objects, This is accomplished by releasing the pressure before the bulb can be entirely unscrewed from the fitting 20. When the bulb is screwed out to the position of Figure 5 the neck 28 is no longer in contact with the gasket 24 and accordingly the liquid under pressure can pass up between the threads of the bulb neck and the fitting and become reduced to substantially atmospheric pressure long before it is possible to unscrew the neck all the way from the fitting.

It will be noted that quite a number of threads are left in mesh in the position of Figure 5 and by the time the bulb is unscrewed about one or two of these threads the pressure has all been 4 dissipated, the liquid merely spilling into the holder and on to the bottom I6. After the bulb is removed the spilled liquid may be poured out of the holder and the holder wiped out and is ready for use with another bulb after the clogged condition has been remedied.

In the modified construction of Figure 7 those parts which are similar to the previous figures are given the same reference numerals with the following described differences in construction:

The fitting 29a is threaded on its outside instead of internally and is provided with a gasket 25a which is different in design so as to seal against a smooth neck 28a of a bulb 23a. This figure illustrates the regulation type of Sparklet bulb and piercing is accomplished by providing a sub-holder 68 to be threaded on to the fitting 25a and having a cap 10 threaded into its upper end. The sub-holder 68 has an internal flange 12 against which the bulb is forced by the cap 10 when it is screwed into position so that the subholder and bulb are then movable up and down as a unit. Then when the sub-holder is screwed on to the fitting 20a it first seals the neck 28a against the gasket 25a and then the piercing pin 24 engages the neck of the bulb and pierces it as the holder is screwed on down.

In the event the parts are clogged so that the bulb cannot discharge after it is pierced the subholder 68 can be screwed outwardly to the position of Figure '1 whereupon the gasket 2511 will begin to leak liquid to the threads between the fitting 20a and the sub-holder and the pressure will be reduced by escape of the liquid through the threads before the holder can be completely unscrewed.

Some changes may be made in the construction and arrangement of the parts of my sprayer without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modified forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim as my invention:

1. In a spraying device, a cylinder-like holder for a bulb in inverted position with a portion of the bulb projecting from said holder, a pin to pierce the bulb when inserted in said holder, the bottom for said holder supporting said pin, a conduit leading downwardly from said piercing pin and having a return bend terminating in an upwardly directed end passing through said bottom to terminate above the top of said holder, a control valve for the terminal end of said conduit, a valve operating lever for said control valve, said lever surrounding said portion of said bulb projecting from said holder, and a false bottom enclosing said return bend.

2. A spraying device comprising a holder for a bulb in inverted position, means to pierce the bulb when inserted in said holder, a conduit leading downwardly from said piercing means and returning upwardly through said holder to terminate adjacent the top thereof, a control valve for said conduit, a lever for operating said valve, said lever being annular in character to surround the bulb and pivoted at diametrically opposite points whereby one side midway between said points may be depressed for raising the diametrically opposite side to operate said valve.

3. A spraying device comprising a holder for a bulb, means to pierce the bulb when inserted in said holder, a conduit leading from said piercing means to terminate adjacent and outside the top of said holder, a control valve for said conduit comprising a valve body over the upper end of the conduit, a sealing disc therein to contact the end of the conduit, a lever for operating said valve, said valve body being connected therewith and having a sealing washer therein carried by the valve body and surrounding said conduit, and a discharge nozzle removably mounted on said valve body and communicating with the space between said sealing disc and said sealing washer, said discharge nozzle having a short section of capillary tube received therein to provide the discharge orifice of said nozzle and restrict the flow of liquid therefrom.

ANDREW S. KNAPP.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number 

